Sefer HaChinukh 29

To not worship idolatry in that which is its way to be worshiped: That we not worship any idolatry in the world with the things that are the way of those that believe in it to worship it. And even though its worship is not with one of the four worships that we said above, since he worshiped it with that which is its way to be worshiped, he is liable. And even [if] its worship is in a way of disgrace — for example, one who defecates to Peor, or one who throws stones at Markulis or one who passes his seed to Kamosh — as it is stated (Exodus 20:5), “or worship them,” meaning to say with what is their way to be worshiped, whatever worship it may be.

Its root is known. Its laws — for example, what the law is for one who worships it in the way of its worship with the intention of disgracing it (Sanhedrin 64a); and the rest of its details — are in Tractate Avodah Zarah.

And [it] is practiced in every place and at all times by males and females. And one who transgresses it volitionally and there are witnesses is stoned. And this law is also elucidated in Chapter Seven of Sanhedrin. These two commandments that Rambam, may his memory be blessed, counted — which are bowing down to idolatry and also not to worship it according to how it is its way to be worshiped — Ramban, may his memory be blessed, included in the commandment of “You shall have no,” and as we wrote above (Sefer HaChinukh 27). It comes out that he removes two commandments here from the calculation of Rabbi Moshe Maimonides (Rambam), may his memory be blessed.